Case for a plasma display screen



FIG. 1 is a front, top and left side perspective view of the design for a case for a plasma display screen;

FIG. 2 is a top plan view of the case;

FIG. 3 is a front elevation of the case, the rear elevation being identical;

FIG. 4 is a left side elevation of the case, the right side elevation being identical; and,

FIG. 5 is a bottom plan view of the case. 

The ornamental design for a case for a plasma display screen, as shown and described. 